I'm sick of this knee-jerk freakout reaction towards anything DLC-related. This is not an episodic game and I'm not sure how ZeronHitaro even got that impression. They said that there are three pieces of DLC planned but two of them and purely for multiplayer, only one relates to the single-player experience at all. And while they haven't actually said what's in the single-player DLC, not a single review I've read said anything about the ending of the game feeling incomplete. Nor did they say that the base game was particularly short (edit: I might add that it's actually longer than any of the Uncharted games...). The DLC could just be random extra missions or something. Or something stuck in the middle, ala Deus Ex: HR.
Also, they said that buying the "season pass" (which is $20) is a %30 discount compared to buying the DLCs individually. But a) that's a package deal, not a preorder thing. You should be able to get it at any point. And b) only one of the DLCs is related to single-player at all, the other two are purely for multiplayer. So if you only care about single-player then you're probably looking at a whopping $10. Not $30-40. That's assuming you don't just ignore it.
DLC can certainly be abused, but that doesn't mean that all DLC is inherently bad. You know, some people are actually perfectly willing to pay some extra money for new things to do in a game that they like.